我以前學係一開始用reference angle搵x,y coordinates (x = r cos \theta, y = sin \theta),然後可以解釋到ASTC,至於simpilfy sin(pi - x)係要喺個unit cricle畫返隻congruent triangle出嚟睇,當然後尾已經係記口訣啦
Regen2020-10-10 20:24:34
問題而家學都冇撚得返
Alderweireld2020-10-10 21:20:05
已閱2020-10-10 21:58:48
上面張相係咪來自maths in action?
Alderweireld2020-10-10 21:59:19
yes
已閱2020-10-10 22:00:25
新版定舊版?
Alderweireld2020-10-10 22:03:12
新版
或者就這樣吧2020-10-10 22:36:13
有無人知呢款integral sign係用咩software打出黎
latex?
Alderweireld2020-10-10 23:26:59
Unicode U+222B
不過我諗佢係9成9都係用mathtype打
Alderweireld2020-10-10 23:31:06
應該話只要你用個font無特別design過個integral symbol,打出嚟都會係幅圖入面咁嘅樣
而幅圖好明顯就用緊times new roman